https://en.wikipedia.org/wiki/Industrial_internet_of_things says: "The XMPP Standards Foundation (XSF) is creating such a framework called Chatty Things, which is a fully open, vendor-independent standard using XMPP to provide a distributed, scalable, and secure infrastructure." Wow, *Chatty Things* :-) The page linked to (https://wiki.xmpp.org/web/Tech_pages/IoT_systems) doesn't mention that cool buzzword, however.
Not sure who was working on that
These names show while search by that keywords; Ronny Klauck and Michael Kirsche. Maybe they known on xmpp ..